Not to mention, as I have explained before, which I assume you did not read, games that employ firearms only, also employ the use of tactical shields, Battlefield 4, CoD: whatever number its at now, and Rainbow Six Siege, all have the option to use tactical shields.
These shields, which could be used with a melee weapon yes, can ALSO be used, and are built to be used, with a side arm. Why stop there, we scrapped together armor with shopping cards and metal scraps, power armor doing the same thing, which is basically full plate armor with a power source.
Those things aren't too fantasy, but we pump the brakes at shields, easily the most tactically beneficial item in existence because Skyrim also employs the use of them, and Bethesda can only use them in one game, or by golly you have to add magic with them.